6to5 - npm Package Compare versions

Comparing version 0.1.6 to 0.1.7

FEATURES.md

@@ -102,4 +102,2 @@ # Features
 var obj = {
-  bar: "foobar",
-
   foo() {
@@ -110,7 +108,7 @@ return "foobar";
   get bar() {
-
+    return this._bar;
   },
 
-  set bar() {
-
+  set bar(val) {
+    this._bar = val;
   }
@@ -136,3 +134,3 @@ };
   });
-};
+}
 ```
@@ -139,0 +137,0 @@

lib/6to5/transformers/block-binding.js

@@ -120,5 +120,3 @@ var traverse = require("../traverse");
   var templateName = "function-call";
-  if (traverse.hasType(node, "ThisExpression")) {
-    templateName = "function-call-this";
-  }
+  if (traverse.hasType(node, "ThisExpression")) templateName += "-this";
 
@@ -125,0 +123,0 @@ //

lib/6to5/transformers/computed-property-names.js

@@ -1,6 +0,9 @@
-var util = require("../util");
-var _    = require("lodash");
+var traverse = require("../traverse");
+var util     = require("../util");
+var _        = require("lodash");
 
 exports.ObjectExpression = function (node) {
   var hasComputed = false;
+  var hasThis     = false;
+
   var computed = [];
@@ -12,2 +15,3 @@
       computed.unshift(prop);
+      if (!hasThis) hasThis = traverse.hasType(prop, "ThisExpression");
       return false;
@@ -21,8 +25,18 @@ } else {
 
-  var container = util.template("function-return-obj", {
+  var templateName = "function-return-obj";
+  if (hasThis) templateName += "-this";
+
+  var container = util.template(templateName, {
     OBJECT: node
   });
 
+  var containerBody;
+  if (templateName === "function-return-obj") {
+    containerBody = container.callee.body.body;
+  } else {
+    containerBody = container.callee.object.body.body;
+  }
+
   _.each(computed, function (prop) {
-    container.callee.body.body.unshift(util.template("obj-key-set", {
+    containerBody.unshift(util.template("obj-key-set", {
       KEY: prop.key,
@@ -29,0 +43,0 @@ VALUE: prop.value

package.json

 {
   "name": "6to5",
   "description": "Turn ES6 code into vanilla ES5 with source maps and no runtime",
-  "version": "0.1.6",
+  "version": "0.1.7",
   "author": "Sebastian McKenzie <[e-mail]>",
@@ -20,4 +20,20 @@ "homepage": "https://github.com/sebmck/6to5",
   },
+  "keywords": [
+    "es6-transpiler",
+    "scope",
+    "harmony",
+    "blockscope",
+    "block-scope",
+    "let",
+    "const",
+    "var",
+    "es6",
+    "transpile",
+    "transpiler",
+    "traceur",
+    "6to5"
+  ],
   "scripts": {
-    "test": "mocha"
+    "bench": "make bench",
+    "test": "make test"
   },
@@ -36,5 +52,10 @@ "dependencies": {
   "devDependencies": {
+    "es6-transpiler": "0.7.17",
+    "istanbul": "0.3.2",
+    "matcha": "0.5.0",
     "mocha": "1.21.4",
-    "istanbul": "0.3.2"
+    "traceur": "0.0.66",
+    "esnext": "0.11.1",
+    "es6now": "0.8.11"
   }
 }

README.md

@@ -188,8 +188,47 @@ <p align="center">
 
-## Comparison to Traceur
+## Comparison to other transpilers
 
-6to5 is different to Traceur in a few very distinct ways.
+|                            | 6to5 | Traceur | esnext | es6now | es6-transpiler |
+| -------------------------- | ---- | ------- | ------ | ------ | -------------- |
+| No runtime                 | ✓    |         |        |        | ✓              |
+| Source maps                | ✓    | ✓       | ✓      |        | ✓              |
+| **Compiler usage:**        |      |         |        |        |                |
+| No global pollution        | ✓    |         | ✓      |        | ✓              |
+| **Syntax features:**       |      |         |        |        |                |
+| Array comprehension        | ✓    | ✓       | ✓      |        | ✓              |
+| Arrow functions            | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Block binding              | ✓    | ✓       |        |        | ✓              |
+| Classes                    | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Computed property names    | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Constants                  | ✓    | ✓       |        |        | ✓              |
+| Default parameters         | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Destructuring              | ✓    | ✓       | ✓      | ✓      | ✓              |
+| For-of                     | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Generator comprehension    |      | ✓       | ✓      |        | ✓              |
+| Generators                 |      | ✓       | ✓      |        |                |
+| Modules                    | ✓    | ✓       |        | ✓      |                |
+| Property method assignment | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Property name shorthand    | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Rest parameters            | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Spread                     | ✓    | ✓       | ✓      | ✓      | ✓              |
+| Template literals          | ✓    | ✓       | ✓      | ✓      | ✓              |
 
-### Runtime
+#### Performance
 
+    $ make bench
+
+##### Output size (including runtime)
+
+Lower is better.
+
+![Output size graph](http://i.imgur.com/cHMdnM9.png)
+
+##### Compile speed
+
+Higher is better.
+
+![Compile speed graph](http://i.imgur.com/YYx2R8O.png)
+
+### [Traceur](https://github.com/google/traceur-compiler)
+
 Traceur requires quite a bulky runtime (~75KB) and produces quite verbose code.
@@ -199,6 +238,17 @@ While this can be trimmed down by selectively building the runtime, it's an
 
-Instead of mapping to a runtime, 6to5 maps directly to the equivalent ES5. This
-means that your transpiled code will be as simple as possible and is
-**exactly** the equivalent ES5.
+### [esnext](https://github.com/esnext/esnext)
 
-### Performance
+esnext is **slow**, painfully so. Runtime required.
+
+### [es6now](https://github.com/zenparsing/es6now)
+
+Doesn't output sourcemaps. This is cited as a positive as line-to-line mapping
+is the goal. This however obviously doesn't retain column mapping resulting in
+the output code not being very pleasant.
+
+### [es6-transpiler](https://github.com/termi/es6-transpiler)
+
+es6-transpiler requires shims to compile and pollutes the global scope resulting
+in possible collisions. es6-transpiler maps line-by-line, just like es6now, this
+results in the same issues such as lack of column information and unpleasant
+code output.

templates.json

@@ -1,1 +0,1 @@
-{"arguments-slice-assign-arg":{"type":"Program","body":[{"type":"VariableDeclaration","declarations":[{"type":"VariableDeclarator","id":{"type":"Identifier","name":"VARIABLE_NAME"},"init":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"Array"},"property":{"type":"Identifier","name":"prototype"}},"property":{"type":"Identifier","name":"slice"}},"property":{"type":"Identifier","name":"call"}},"arguments":[{"type":"Identifier","name":"arguments"},{"type":"Identifier","name":"SLICE_ARG"}]}}],"kind":"var"}],"comments":[]},"arguments-slice-assign":{"type":"Program","body":[{"type":"VariableDeclaration","declarations":[{"type":"VariableDeclarator","id":{"type":"Identifier","name":"VARIABLE_NAME"},"init":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"Array"},"property":{"type":"Identifier","name":"prototype"}},"property":{"type":"Identifier","name":"slice"}},"property":{"type":"Identifier","name":"call"}},"arguments":[{"type":"Identifier","name":"arguments"}]}}],"kind":"var"}],"comments":[]},"arguments-slice":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"Array"},"property":{"type":"Identifier","name":"prototype"}},"property":{"type":"Identifier","name":"slice"}},"property":{"type":"Identifier","name":"call"}},"arguments":[{"type":"Identifier","name":"arguments"}]}}],"comments":[]},"array-comprehension-container":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"FunctionExpression","id":null,"params":[],"defaults":[],"body":{"type":"BlockStatement","body":[{"type":"VariableDeclaration","declarations":[{"type":"VariableDeclarator","id":{"type":"Identifier","name":"KEY"},"init":{"type":"ArrayExpression","elements":[]}}],"kind":"var"},{"type":"ReturnStatement","argument":{"type":"Identifier","name":"KEY"}}]},"rest":null,"generator":false,"expression":false},"arguments":[]}}],"comments":[]},"array-comprehension-filter":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"ARRAY"},"property":{"type":"Identifier","name":"filter"}},"arguments":[{"type":"FunctionExpression","id":null,"params":[{"type":"Identifier","name":"KEY"}],"defaults":[],"body":{"type":"BlockStatement","body":[{"type":"ReturnStatement","argument":{"type":"Identifier","name":"FILTER"}}]},"rest":null,"generator":false,"expression":false}]},"property":{"type":"Identifier","name":"map"}},"arguments":[{"type":"FunctionExpression","id":null,"params":[{"type":"Identifier","name":"KEY"}],"defaults":[],"body":{"type":"BlockStatement","body":[{"type":"ReturnStatement","argument":{"type":"Identifier","name":"STATEMENT"}}]},"rest":null,"generator":false,"expression":false}]}}],"comments":[]},"array-comprehension-for-each":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"ARRAY"},"property":{"type":"Identifier","name":"forEach"}},"arguments":[{"type":"FunctionExpression","id":null,"params":[{"type":"Identifier","name":"KEY"}],"defaults":[],"body":{"type":"BlockStatement","body":[]},"rest":null,"generator":false,"expression":false}]}}],"comments":[]},"array-comprehension-map":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"Identifier","name":"ARRAY"},"property":{"type":"Identifier","name":"map"}},"arguments":[{"type":"FunctionExpression","id":null,"params":[{"type":"Identifier","name":"KEY"}],"defaults":[],"body":{"type":"BlockStatement","body":[{"type":"ReturnStatement","argument":{"type":"Identifier","name":"STATEMENT"}}]},"rest":null,"generator":false,"expression":false}]}}],"comments":[]},"array-concat":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression","computed":false,"object":{"type":"ArrayExpression","elements":[]},"property":{"type":"Identifier","name":"concat"}},"arguments":[{"type":"Identifier","name":"ARGUMENT"}]}}],"comments":[]},"array-push":{"type":"Program","body":[{"type":"ExpressionStatement","expression":{"type":"CallExpression","callee":{"type":"MemberExpression",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